ExStik Waterproof Meters Measure pH or ORP

  • ExStik pH Meter
  • Measures pH from 0.00 to 14.00 pH
  • 0.01 pH resolution and accuracy.
  • Temperature measures from 23°F to 194°F (-5°C to 90°C).
  • Smart chip predicts pH electrode performance with “RENEW” indicator when replacement is needed.
  • Analog bargraph originates at neutral point (pH 7.00) and fluctuates to the left or right depending on the pH level.
  • “CAL” indicator alerts user to recalibrate.
  • 1, 2 or 3 point buffer calibration.
  • Automatic Temperature Compensation.
  • Simultaneous display of pH and temperature.
    ExStik ORP Meter
  • Measures ORP from -999 to 999 mV with high resolution of 1 mV and ±4 mV accuracy.
  • Automatic electronic self calibration.
  • Simulated analog bargraph displays change in ORP reading.
    ExStik Common Features:
  • Memory stores and recalls 15 readings and saves last calibrated value.
  • Data validation indicators show user the reading is stabilized.
  • Large 3.5 digit (2000 count) digital display with bargraph.
  • Data Hold, Auto shut-off and low battery indication.
  • Easy to replace electrode modules can be used with any ExStik meter; (built-in chip automatically recognizes the type of probe plugged in for specific measurements).
  • Waterproof design floats in water and protects the meter in wet environments.
  • Complete with meter and electrode, protective sensor cap, sample cup, four LR44 button batteries, and neckstrap.
  • Optional weighted base holds plastic cup and ExStik meter.

Manufacturer : Extech Instruments Corporation

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Cat.#DescriptionMfg.#PriceQuantityEstimated Availability
638-300-02ExStik® pH Meter (Gel Filled)PH100$195.02 EA  
Ships from stock
638-300-06ExStik® pH Meter (Refillable)PH110$297.51 EA  
Ships within 2 weeks
638-300-20ExStik® ORP MeterRE300$229.09 EA  
Ships within 2 weeks

Parts & Accessories:

Cat.#DescriptionMfg.#PriceQuantityEstimated Availability
638-300-04Replacement pH Electrode (Gel Filled)PH105$105.00 EA  
Ships from stock
638-300-08Replacement pH Electrode (Refillable)PH115$105.00 EA  
Ships within 2 weeks
638-300-10Reference Solution Refill Kit for 638-300-06PH113$37.49 EA  
Ships within 2 weeks
638-300-22Replacement ORP ElectrodeRE305$114.55 EA  
Ships within 2 weeks
638-300-34Weighted Base with 5 Solution CupsEX006$28.63 EA  
Ships within 2 weeks
643-100-02Tripak Buffers (6 of pH 4, 7, 10 & 2 Rinsing Solutions)PH103$42.00 PK / 20  
Ships within 2 weeks


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Flat Surface Electrodes work in liquids, semi-solids and solids

Optional weighted base (638-300-34)
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